All major news outlets are reporting that Cook County Circuit Judge Tracie Porter heavily relied on the prior
finding by the Colorado Supreme Court, calling Colorado’s “rationale
compelling.”
“The court also realizes the magnitude of this decision and its
impact on the upcoming primary Illinois elections,” Porter wrote. “The
Illinois State Board of Election shall remove Donald J. Trump from the
ballot for the General Primary Election on March 19, 2024, or cause any
votes cast for him to be suppressed.”
The judge stripped Trump from the Illinois ballot one month after the anti-Trump challenge was dismissed by the Illinois State Board of Elections. In a unanimous and bipartisan vote, the election board tossed the anti-Trump case because it said it didn’t have jurisdiction to review the matter.
Chicago Area News story: IL Election Board Allows Trump On Ballot
Illinois is now the third state where Trump was booted from the
ballot, after Colorado and Maine. But those decisions were paused
pending the appeal of the Colorado case to the US Supreme Court.
Trump can appeal the judge’s decision in Illinois state courts. He has already beaten back similar lawsuits in many other states & remains on those state's ballots as of now.